Electric sewing machine



Jan. 27. 1925.

F. DIEHL ELECTRIC SEWING MACHINE l rv e e lll I l s II m e e h 2 l y 1 n im.: L :Q w. A u d e .1J F H|. |||U1 m |.LU v -:--MHHHHMMMHHHMHMM( INVENTOR ATTORNEY Jan. 27. 1925.

F. DIEHL ELECTRIC SEWING MACHINE Filed Aug. 5, 1921 2 sheets-sheet 2 f l l n l e I l l l 1 1 l I A i I l t I l A l 1| ATTORNEY R O. T. N E V W i FREDERICK DIEHL, F ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGER MANU- FAGTURING COMPANY, OF ELIZABETH, NEW JERSEY, A CORPORATION 0F lll-EW JERSEY,

ELECTRIC SEWING MACHNE.

Application led August 5, 1921. Serial No'. 490,050.

,To all whom i may concern: I

Be it known that 1, FREDERICK DnaHL, a citizen of the United States, residin at lllizabetlfi, in the county of Union and tate of New' Jersey, have invented certain new lili and useful Improvements in Electric bewing Machines, oit which the ioilowingis a specification, reference being had therein to the accompanying drawings.

This invention relates to sewing .machines more particularly ot the so-called port able type and has for an object to provide a motor-driven sewing machine. of compact and iight-weight, yet durable and etliclent construction, so that it may be readily carried from place to place without fatigue and set up tor use on an ordinary table,

Another object of the invention is to provide a chain-stitch sewing machine of the type having its rotary maiinshaft below the level ot the cloth-plate1 with a motor drive which will not add objectionably to 'the weight oi' the outfit or tothe sine of the usual carrying case encompassing 1t.

lurther objects of the invention will appear as the description proceeds.

Heretotore, the driving motor for a machine of thetype referred to, has been ot heavy low-speed construction necessitated by the tact that the motor-shaft was directly connected to the sewing machine shaft and rotated at the sameA speed as the latter. a long carrying case was required to house both the machine and its motor.

1n the present instance the motor is of the small high-speed type and is mounted on the sewing machine ase-plate with its shaft transverse to the sewing machine shaft; the drive being etl'ected through spiral gears. Preferably, the motor I1s of the type having its shaft bearings` entirely at one side oit the motor armature to reduce to a minimum the extension of the motor laterally ot the sewing machine, and bring it within the space enclosed by the usual hand-carrying case. Any usual type ot motor-controller or rheostat may be used in the motor circuit.

lin the accompanying drawings, Fig, 1 is a front elevation, partly in section of a sewing machine embodying the invention. iF ig. 2 is a fragmentary bottom plan View ot the machine and motor-supporting baselate. lili 3 is a section on the line 3 3, ig. 2. ig. 4 is a transverse vertical sec- Also tion in the plane of the motor-shaft, and Fig. 5 is a disassembled perspective of the motor and its attaching plate. i

The outfit includes a sewing machine of the well known Singer A.. C. S. type comprising a pedestal 1, bed 2, bracket-arm or go-oseneck 3, needle 4, pressereitoot 5 and feed-dog y 6 operating as usual through apertures in the cloth-plate 'a' below which and in the bed 2 is journaled the rotary main-shaft 8 on which is mounted the usual rotary chain-stitch looper 9. rllhe needle 4 is carriedby the recipiocatory needle-bar 10 which is operated by the link connection 1l with the rocloshatt 12 having the usual pitman connection 13 with the crank 14 on the main-shaft 8.

The pedestal 1 ot the machine is secured by means ot the screw-bolt '15 to the rectangular plate 1G which lits and closes the top opening of the hollow -wooden base- Inember 17 ot the usual hand-carrying case 13.

rlhe driving Inotoi,n 19 preferably con structed substantially in accordance with the disclosure of the Dosch et al. Patent No. 1,311,114, ot July 22, 1919, and comprises the frame 20, field 21 and armature 22 carried at one end of the motor-shaft 23 which is journaled in the space bearin 24, 24 in the bearing extension 253 of the trame 20.

rlthe motor is received in a Tehaped aperture in the base-plate 16, the field 21 and circular part of the motor-frame litting the head 26 of the "T -shaped aperture while the extension ot' the motonframe is received within the stem 27 of the said aperture.

YSecured to the under tace of the motorframe extension 25 by screws 28 is the rectangular plate 29 having clearance holes 30 for the motor oi1-cups 31. Thisplate is secured to the under side of the base-plate 16 by screws 32 and serves to tix the motor rigidly inoperative position with its driving pinion 33 in mesh with the driven gear 34 on the sewing machine shaft 8. The motor leads 35 ma. extend tothe usual plugterminals 36 in t e rear side wall of the base 17.

The driven gear 34 is housed within the open bottomed cavity 37 ot the hollow enlargement 38 at the base of the goose-neck 3 where the latter joins the bed 2. The mainshaft 8 passes through the gear cavity 7 and supports the driven gear 34 therein. The

motor frame extension 25 substantially closes the bottom of the gear cavity, as shown best in Fig. 4.

It will be noted that the carrying case for the entire outfit described is no longer or larger in any respect than the usual carrying case commonly used for machines of this type, without the motor.

Having thus set orth the nature or' the invention, what l claim herein isl. A portable electric sewing machine comprising a hand carrying case havingl a hollow rectangular base7 a fiat plate removably closing the top opening in said base and formed with a motor-receivingV aperture.

a sewing head constructed with a trame haw.

ing a pedestal mounted on the upper side of said fiat plate7 a raised cloth-plate and a main-shaft below said cloth-plate, and a driving motor received Within the aperture in and carried entirely by said plate5 said motor having its shaft disposed transversely of and below the sewing machine mainlshat, and a reduction gear connection between said motor and machine shafts.

2. A portable electric sewing machine co1nprising a hand carryirncY case harina a hol low rectangular base, a flat plate removably closing' the top opening in said hase and formed with a motor receiving aperturev` a sewing head constructed with a frame having a pedestal mounted on the upper side of said flat plate and a goosencck formed ad jacent its juncture with said pedestal with an open-bottomed `gear cavity, a main-shaft journaled in the sewing' head trame and passing through said gear-cavity, a rearwheel fixed to the main-shaft within said cavity, and an electric motor haring` a fieldframe received within the aperture in said Hat plate and a hearingr extension ai' one side of said held-'frame below said crearcavity, said bearing extension being secured. to said fiat plate and said motor haviimr a power-shaft `iournaled in said bearingl extension and connected to drive said neai wheel.

In testimony whereof, l have signed mr name to this specification.

FREDERICK Dlllvlla 

